Method of controlling the commutation in an electronically commutated motor, and an electronically commutated motor for carrying out said method

A method is disclosed for controlling the commutation in an electronically commutated motor which comprises a stator having at least one phase, and a permanent-magnet rotor, and with which a current limiter and a controller for regulating a motor variable are associated. The current limiter serves to limit the current (I) in the at least one phase to a setpoint value. The regulation by means of the controller is accomplished by modifying the distance in time (W) between switching on (t) and switching off (t) of the current (i, i) in the at least one phase. In this method, the setpoint value to which the current limiter limits the current (i, i) in the relevant phase is modifiable. It is modified substantially as a function of a ratio of two times (W/T), namely as a function of the ratio of the distance in time (W) between switching on (t) and switching off (t) of the current (i, i) in the relevant phase to the time period (T) required by the rotor, at the instantaneous rotation speed, to rotate through a specified rotation angle. A decrease in noise at low rotation speeds is thereby made possible.